STIGQter: STIG Summary: Cisco IOS-XE Switch RTR Security Technical Implementation Guide Version: 2 Release: 1 Benchmark Date: 23 Apr 2021:

The Cisco switch must be configured to implement message authentication for all control plane protocols.

DISA Rule

SV-220987r622190_rule

Vulnerability Number

V-220987

Group Title

SRG-NET-000230-RTR-000001

Rule Version

CISC-RT-000020

Severity

CAT II

CCI(s)

• CCI-000366 - The organization implements the security configuration settings.
• CCI-002205 - The information system uniquely identifies and authenticates source by organization, system, application, and/or individual for information transfer.

Weight

10

Fix Recommendation

Configure authentication to be enabled for every protocol that affects the routing or forwarding tables. The example configuration commands below enables OSPF, EIGRP, IS-IS, and BGP authentication.

BGP Example:

SW1(config)#router bgp nn
SW1(config-switch)#neighbor x.x.x.x password xxxxxx

EIGRP Example:

SW1(config)#key chain EIGRP_KEY
SW1(config-keychain)#key 1
SW1(config-keychain-key)#key-string xxxxx
SW1(config-keychain-key)#exit
SW1(config-keychain)#exit
SW1(config)#int g0/0
SW1(config-if)#ip authentication mode eigrp 1 md5
SW1(config-if)#ip authentication key-chain eigrp 1 EIGRP_KEY
SW1(config-if)#end

IS-IS Example:

SW1(config)#int g0/0
SW1(config-if)#isis password xxxxxx

OSPF Example:

SW1(config)#int g0/0
SW1(config-if)#ip ospf authentication-key xxxxx
SW1(config-if)#end

Check Contents

Review the switch configuration. Verify that authentication is enabled for all routing protocols. The configuration examples below depicts OSPF, EIGRP, IS-IS and BGP authentication.

BGP Example:

router bgp nn
no synchronization
bgp log-neighbor-changes
neighbor x.x.x.x remote-as nn
neighbor x.x.x.x password xxxxxxx

EIGRP Example:

key chain EIGRP_KEY
key 1
key-string xxxxxxx
…
…
…
interface GigabitEthernet0/0
no switchport
ip address x.x.x.x 255.255.255.0
ip authentication mode eigrp 1 md5
ip authentication key-chain eigrp 1 EIGRP_KEY

IS-IS Example:

interface GigabitEthernet0/0
no switchport
ip address x.x.x.x 255.255.255.0
ip router isis
isis password xxxxxxx

OSPF Example:

interface GigabitEthernet0/0
no switchport
ip address x.x.x.x 255.255.255.0
ip ospf authentication-key xxxxx

If authentication is not enabled on all routing protocols, this is a finding.

Vulnerability Number

V-220987

Documentable

False

Rule Version

CISC-RT-000020

Severity Override Guidance

Review the switch configuration. Verify that authentication is enabled for all routing protocols. The configuration examples below depicts OSPF, EIGRP, IS-IS and BGP authentication.

BGP Example:

router bgp nn
no synchronization
bgp log-neighbor-changes
neighbor x.x.x.x remote-as nn
neighbor x.x.x.x password xxxxxxx

EIGRP Example:

key chain EIGRP_KEY
key 1
key-string xxxxxxx
…
…
…
interface GigabitEthernet0/0
no switchport
ip address x.x.x.x 255.255.255.0
ip authentication mode eigrp 1 md5
ip authentication key-chain eigrp 1 EIGRP_KEY

IS-IS Example:

interface GigabitEthernet0/0
no switchport
ip address x.x.x.x 255.255.255.0
ip router isis
isis password xxxxxxx

OSPF Example:

interface GigabitEthernet0/0
no switchport
ip address x.x.x.x 255.255.255.0
ip ospf authentication-key xxxxx

If authentication is not enabled on all routing protocols, this is a finding.

Check Content Reference

M

Target Key

4074

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